[HADOOP-9369] DNS#reverseDns() can return hostname with . appended at the end

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1.1, 2.0.3-alpha, 0.23.5
• Fix Version/s: 1.2.0, 2.1.0-beta
• Component/s: net
• Hadoop Flags: Reviewed
• Assignee: Karthik Kambatla
• Reporter: Karthik Kambatla
• Created: 06/Mar/13 03:18
• Updated: 03/Nov/14 18:33
• Resolved: 07/Mar/13 23:57

Description

DNS#reverseDns uses javax.naming.InitialDirContext to do a reverse DNS lookup. This can sometimes return hostnames with a . at the end.

Saw this happen on hadoop-1: two nodes with tasktracker.dns.interface set to eth0

Issue Links

• relates to: HBASE-7693 Hostname returned by TableInputFormatBase.reverseDNS contains trailing period